Natalie Jr is to blame for Azusa's status getting leaked. If she hadn't stupidly yelled out her level, the blabbermouth Adventurer wouldn't have heard them and kept telling everyone.
Azusa was already local celebrity for her kindness in curing illness Flata suffered. It's gotten worse since her level status was blabbed.
You would think the fact the famed strongest Witch in the world is living quietly away from anyone would be a PRETTY big hint that she wants to be left alone.
Adventurers are apparently dumb enough to try challenging someone WAY out of their league just to test their powers. Azusa gets bothered by a party shortly after the news about her LV 99 status spreads, despite the fact she has ZERO great heroic deeds to her name in 300 Years.
Azusa didn't bother to remember the names of people in the village. She's outlived at least three generations now.